| Patents for C22B 3 - Extraction of metal compounds from ores or concentrates by wet processes (16,429) |
|---|
| 10/31/2002 | US20020157965 Method of purification of a redox mediator before electrolytic regeneration thereof |
| 10/31/2002 | US20020157572 Concentrated solutions of oxime metal extractants and method of formulating extractant compositions therefrom |
| 10/31/2002 | US20020157504 Sulfidization of sulfide ores for hydrometallurgical extraction of copper and other metals |
| 10/31/2002 | CA2444080A1 Removal of non-water soluble substances from solutions of aqueous metal extracts |
| 10/30/2002 | EP1252345A1 Solvent extraction of impurity metals from a valuable metal sulphate solution |
| 10/30/2002 | EP1251920A1 Method and apparatus for metal removal by ion exchange |
| 10/30/2002 | CN1376803A Recovery method for catalytic metal |
| 10/29/2002 | US6471922 Dissolving waste in water; precipitating thorium and uranium as oxides by addition of reducing agent including metal hydroxide; filtering, drying and packaging radioactive waste for disposal |
| 10/29/2002 | US6471849 Process for the recovery of zinc from a zinc sulphide ore or concentrate |
| 10/29/2002 | US6471743 Leaching such as ilmenite, leucoxene, perovskite or titano magnetite with sulfuric acid; precipitating titanium dioxide; improving efficiency by adding alkali metal halide, grinding, adding carbon source and/or controlling temperature |
| 10/24/2002 | WO2002083592A1 Mineral ore slurry viscosity modification method |
| 10/24/2002 | US20020155048 For selectively removing materials containing nickel from substrates |
| 10/24/2002 | US20020153642 Hydrostatic pressure assisted autoclave system for hydrometallurgical processing |
| 10/24/2002 | US20020152845 Oxidative pressure leach recovery of precious metals using halide ions |
| 10/24/2002 | DE10119685A1 Removing water-insolubles from aqueous metal solution, e.g. in production of aluminum oxide by the Bayer process, involves adding water-soluble cationic polyelectrolyte based on dimethylaminopropyl-acrylamide |
| 10/24/2002 | CA2441758A1 Mineral ore slurry viscosity modification method |
| 10/23/2002 | EP1251185A2 Gelatin encapsulated metal powder for silver recovery from processing solutions |
| 10/23/2002 | CN1375565A Dearsenifying method for Cu-Zn-Co material |
| 10/23/2002 | CN1375564A Method of extracting metal gallium frojm smelting smoke dust of corundum arc furnace |
| 10/22/2002 | US6468483 Process for treating alumina-bearing ores to recover metal values therefrom |
| 10/22/2002 | US6468445 Solvent for the simultaneous recovery of radionuclides from liquid radioactive wastes |
| 10/22/2002 | US6468414 Oxidation of cerium iii to iv or chromium iii to vi in solution; heat evaporation followed by precipitation filtration to remove volatile and nonvolatile impurities respectively |
| 10/22/2002 | US6468327 Purification of dusts containing zinc, lead, copper, cadmium, nickel and iron, using mixtures of acid salts and alcohols, aldehydes, ketones or esters; electrolysis; solvent extraction; precipitation; distillation |
| 10/20/2002 | CA2359384A1 Apparatus and method for recovery of gold and silver from ore |
| 10/17/2002 | WO2002081761A2 Bioleaching of a sulphide concentrate in a saline solution |
| 10/17/2002 | WO2002029124A3 Heat transfer in heap leaching of sulphide ores |
| 10/17/2002 | US20020148759 Reaction of the methyl or ethyl ester of a fatty acid having 6 to 22 carbon atoms with a hydroxylamine salt and an alkali metal hydroxide in the presence of water, either a hydrocarbon oil or a fatty oil |
| 10/16/2002 | EP1248863A1 Method to control manganese in zinc leach circuits |
| 10/10/2002 | WO2002079528A1 Recovery of precious metals from thiosulfate solutions |
| 10/10/2002 | WO2002048046A3 Process for recovering arsenic from acidic aqueous solution |
| 10/10/2002 | US20020147366 Alkoxylated tertiary and quaternary amine surfactants |
| 10/09/2002 | CN1373083A Process for preparing size-controllable nano-powder |
| 10/08/2002 | US6461577 Biooxidation |
| 10/08/2002 | US6461502 Apparatus for recovering a specific ingredient in sea water |
| 10/03/2002 | WO2002077302A2 Recovery of gold from carbon eluate cyanide solution |
| 10/03/2002 | WO2002077301A1 Metal ion extraction materials and processes using same |
| 10/03/2002 | WO2002020855A3 Pressure leaching process for zinc recovery from suphidic ore materials |
| 10/03/2002 | US20020139753 Materials and methods for the separation of copper ions and ferric iron in liquid solutions |
| 10/03/2002 | CA2440977A1 Metal ion extraction materials and processes using same |
| 10/02/2002 | EP1245686A2 Method and apparatus for leaching zinc concentrates |
| 10/02/2002 | EP1245685A1 Method for producing metal or metal compound comprising process of treating with fluorine and adjusted raw material used therein |
| 10/02/2002 | EP1244817A1 Improved bacterial oxidation of sulphide ores and concentrates |
| 10/02/2002 | CN1372653A Method to extract silver from photographic developer |
| 10/02/2002 | CN1372600A Improved bacterial oxidation of sulphide ores and concentrates |
| 10/01/2002 | CA2155050C Recovery of nickel using heap leaching |
| 09/26/2002 | WO2002038819A3 Process for regeneration of spent acid halide leach solutions |
| 09/26/2002 | WO2002036838A3 Direct atmospheric leaching of highly-serpentinized saprolitic nickel laterite ores with sulphuric acid |
| 09/26/2002 | WO2002002833B1 Preparation of pure ferric chloride from hydrochloric acid solutions by solvent extraction |
| 09/26/2002 | WO2001088212A3 Method for thiosulfate leaching of precious metal-containing materials |
| 09/26/2002 | US20020136660 Powdered platinum is poured into water to prepare suspension, zirconium nitrate and urea solutions are added to adjust suspension pH to precipitate zirconium hydroxide, mixture is molded, sintered, forged, rolled; structures for glass molding |
| 09/26/2002 | US20020134201 On ore handling points comprising applying aqueous solution of alkyl polyglucoside; leaching with bacteria to recover metal |
| 09/25/2002 | EP1242638A1 A process for the recovery of copper from aqueous solutions containing iodinated organic compounds |
| 09/25/2002 | EP1242637A1 A bacterially assisted heap leach |
| 09/25/2002 | CN1371358A Method for separating copper from iron |
| 09/25/2002 | CN1370844A Direct divalent Co, Fe and Mn extracting and separating process without need of pre-oxidation |
| 09/25/2002 | CN1370828A Intermediate thermophilic acidophilic thiobacillu strin and its application |
| 09/25/2002 | CN1370742A Production process of copper sulfate from copper sulfide ore |
| 09/25/2002 | CN1091469C Antimony-removing and impurity-removing method for copper electrolytic solution |
| 09/24/2002 | US6455019 Process for the extraction of copper from a sulphide copper ore or concentrate |
| 09/24/2002 | US6455018 Recovery of precious metal and other values from spent compositions/materials |
| 09/19/2002 | WO2002072899A2 Method for recovering zirconium values from a hard rock ore containing zircon and uranium |
| 09/19/2002 | WO2002072898A1 Method for processing fluorinated and titaniferous solutions after opening loparite and titaniferous concentrates in order to obtain titanium dioxide |
| 09/19/2002 | WO2002072896A1 A method for the precipitation of silica in connection with zinc ore leaching |
| 09/19/2002 | WO2002072895A1 A method for the removal of calcium from a zinc process sulfate solution |
| 09/19/2002 | US20020132388 Tantalum sputtering target and method of manufacture |
| 09/19/2002 | CA2440858A1 A method for the precipitation of silica in connection with zinc ore leaching |
| 09/19/2002 | CA2439914A1 A method for the removal of calcium from a zinc process sulfate solution |
| 09/19/2002 | CA2439768A1 Method for recovering zirconium values from a hard rock ore containing zircon and uranium |
| 09/18/2002 | EP0909447B1 method for producing nickel or cobalt hexacyanoferrates |
| 09/18/2002 | CN1090983C Method and appts. for conducting two solutions of liquid-liquid extraction, mixed into dispersion, in controlled fashion into separation part |
| 09/17/2002 | US6451275 Involving a sulfur bearing ore body, comprising the steps of providing a precious metal bearing material having intermediate sulfur oxidation products, and exposing the material to sulfur dioxide gas, bisulfite ions or sulfite ions |
| 09/17/2002 | US6451273 Method of producing an active mineral liquid from granite |
| 09/17/2002 | US6451088 Method for improving metals recovery using high temperature leaching |
| 09/17/2002 | CA2104865C Bacterial leaching process |
| 09/12/2002 | WO2002070758A1 Improved, high yield bioheap leaching of chalcopyrite copper ores |
| 09/12/2002 | WO2002070757A1 A method for the bacterially assisted heap leaching of chalcopyrite |
| 09/12/2002 | WO2002070756A2 Recovery of metals from jarosite-containing materials |
| 09/12/2002 | WO2002070411A1 Scale removal or prevention |
| 09/12/2002 | WO2002070409A1 Process for producing nanometer grade powders |
| 09/12/2002 | US20020125214 Silver stain removal by chemical etching and sonication |
| 09/12/2002 | CA2439485A1 Process for producing nanometer grade powders |
| 09/12/2002 | CA2436417A1 Scale removal or prevention |
| 09/12/2002 | CA2340567A1 Recovery of metals from metal silicates |
| 09/11/2002 | EP1237860A1 Calixarenes |
| 09/11/2002 | CN1369019A Method of removal of impurities from gold concentrate containing sulfides |
| 09/11/2002 | CN1090827C Process for recovery of metals from used nickel-metal bydride accumulators |
| 09/11/2002 | CN1090515C Method and apparatus for recirculating heavier solution from the separation part of two separable solutions into mixing unit |
| 09/10/2002 | US6447738 Leaching with sulfuric acid, reducing any ferric values to ferrous, crystallizing formed double salts, washing, hydrolyzing, washing, drying, calcining |
| 09/06/2002 | WO2002068701A2 Production of zinc oxide from complex sulfide concentrates using chloride processing |
| 09/06/2002 | WO2002068331A1 Process for treating red mud to recover metal values therefrom |
| 09/06/2002 | WO2002033134A3 Basic treatment of ores for the recovery of metals therefrom |
| 09/06/2002 | WO2002008475A3 Method for recovery of copper from sulfidic ore materials using super-fine grinding and medium temperature pressure leaching |
| 09/05/2002 | DE10121946C1 Process for dissolving precious metals contained in residues comprises slurrying the residues with concentrated hydrochloric acid, and feeding hydrogen chloride gas and chlorine gas through the slurry |
| 09/04/2002 | EP1235952A1 Method of electrochemical in situ disposal of metal structures |
| 09/04/2002 | EP1235941A1 Recovery of metal values from aqueous solutions and slurries |
| 09/04/2002 | CN1090243C Regeneration of dithiophosphorus acid metal extractants |
| 09/04/2002 | CN1090242C Orientation silicon-iron sheet with excelent magnetic property and its production method |
| 09/04/2002 | CN1090225C Method of eliminating mercury from liquid hydrocarbons |
| 09/03/2002 | US6444010 Aqueous solution of hydrogen peroxide, hydrogen fluoride and high concentration of hydrochloric acid or sulfuric acid; dissolving palladium, iridium, osmium, ruthenium and rhenium for removal from silicon surface or silicon oxide film |
| 08/29/2002 | WO2002066712A1 Electrorefining process for separating metals |